368 



ORDER 154. CYPERACE^E. 



fascicles few-flowered, the lateral, if any, pedunculate ; ach. small, rough, the dla* 

 6-lobed. Rare northward, common South. 10 16'. 



j3. g-labra. Smoothish, slender, If; lateral fascicles 1-flowered, or 0. Ms. to Ohio. 



y. t'arolfniana. Scabrous-hirsute, slender ; leaves much exceeding the culm. 8. 



6. JElliottii. Stout, 2 3f, denticulate-ciliate ; lateral spikes pedunculate. S. 



5 S. reticularis MX. Slender, If, leaves shorter than culm ; fascicles 2 5, distant, 



snbsef'sile ; ach. dead-white, f, conspicuously netted and pitted. R. I. to Fla. 



6 S. laxa Torr. Slender, weak, diffuse, 1 2f ; Ivs. flat, 2" wide ; fascicles very remote, 



spks. distant, in pairs ; ach. 1", with transverse ridges and brown pits. N. J. to Fla. 

 t S. vcrticillata Muhl. Glabrous, ft 12?, slender; fascicles 4 6, smooth, purple, 

 sessile, 8" 1' apart ; ach. globular, about $", rugous. N. Y. to Ohio, and South. 



8 S. iiiterrtpta MX. Sparingly hirsute, 12 30'; leaves 2" wide; fascicles 5 7, 



rusty-brown, sessile, ciliate, 49" apart ; ach. smooth, I" diameter. South. 



9 S. gracilis Ell. Filiform, smooth, 1 2f ; spikes few (15 pairs), 3", in a terminal 



la^cicle ; bract erect; ach. ovid-triangnlar, ribbed lengthwise. South. 



10 S. BaJdwinii (Torr.) Culm scape-like, 2 3f, leaves all radical, long ; spikes 5" 

 long, 35 pairs in a terminal fascicle, brown-purple, with 3 bracts, middle bract erect ; 

 ach. dull-white, 2" long, even. In Georgia and Florida. 



1C. CHAETOSPORA, R. Br. Spikes 1-5-flowered, fls. $ , glumes in two 

 rows, the lower empty. Setce 36. Stam. 3. 

 Style 3-fid, deciduous. Achenium triangular. 

 If Culm leafy only at base. Fls. capitate, 

 chestnut-brown. 



C. nigricans K. Culm If, erect, teretish, longer 

 than the narrow erect leaves ; spikes 4" long, in 

 one fascicle, bract erect, 13' ; achenium i" 

 diameter, white. Fla., Eur. 



19, CAREX, L. Flowers diclinous. Spks. 

 1 or more, either with both staminate and 

 pistillate flowers (androgynous), or with the 

 two kinds in separate spikes on the same plant 

 (monoecious), or rarely on separate plants (dice- 

 rious). Glumes single, imbricated, each 1-flwd. 

 $ Stamens 3. $ Stigmas 2 or 3. Nut (acJie- 

 nium) 2-edged or 3-angled, enclosed in a sac 

 (perigynium) composed of 2 united glumes. 

 If Culms triangular, in tufts, with grass-like 

 leaves and usually with axillary as well as 

 terminal spikes. 



The following enumeration of our Carices 

 is reduced from the excellent monograph by 

 the lamented Prof. C. Dewey, contained in the 

 Class-book of Botany, and revised with the 

 assistance of friends before mentioned, and 

 whose names appear below. 



Fig. 13, C. flava. 14, One of its perigyuia 

 (magnified) : 15, a glume. Fig. 16, C. rosea. 

 17, A perigynium : 18, a glume. 



